1.1: 1.10 g / AIBN; 2-mercaptopyridine-N-oxide sodium salt hydrate; CBrCl3 / 2 h / Heating 2.1: t-BuLi / pentane / 0.25 h / -78 °C 2.2: B(OMe)3 / pentane / 8 h / -78 - 20 °C 2.3: aq. NH4Cl View Scheme